Even if diabetics successfully control blood sugar, complications will still occur due to oxidative damage to cells from free radicals, doctors said.

In one study, 30 men and women, aged 30 to 65, who had been diagnosed with type 2 diabetes for at least one year, took 1,000 mg of the antioxidant vitamin C per day or a placebo.

All participants were controlling blood sugar with oral medication, were non-smokers, had no vascular or inflammatory disease, and were not being treated for high cholesterol, or taking hormone replacement therapy, beta blockers, diuretics or aspirin.

After six weeks, while the placebo group had not improved, those who had taken vitamin C had significantly lower levels of oxidative stress both after fasting and after a meal.

Discussing their findings, doctors said vitamin C may be a safe, inexpensive way to reduce complications from type 2 diabetes.

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